Dark energy from brane-world gravity
Research output: Chapter in Book/Report/Conference proceeding › Chapter (peer-reviewed) › peer-review
Recent observations provide strong evidence that the universe is accelerating. This confronts theory with a severe challenge. Explanations of the acceleration within the framework of general relativity are plagued by difficulties. General relativistic models require a "dark energy" field with effectively negative pressure. An alternative to dark energy is that gravity itself may behave differently from general relativity on the largest scales, in such a way as to produce acceleration. The alternative approach of modified gravity also faces severe difficulties, but does provide a new angle on the problem. This review considers an example of modified gravity, provided by brane-world models that self-accelerate at late times.
|Title of host publication||The Invisible Universe|
|Subtitle of host publication||Dark Matter and Dark Energy|
|Number of pages||10|
|Publication status||Published - 2007|
|Name||Lecture Notes in Physics|